Allow importing strings from locamotion with a 4th parameter to lang_update

ex:
Without locamotion string import:
./lang_update firefox/new.lang

With locamotion import, all default parameters need to be mentionned:
lang_update firefox/new.lang 0 all locamotion

* logg  actions in console
* list strings imported per locale
* add a whitelist of locamotion locales based on Dwayne's commits the last 3 months